2020 Aquatech China (Sanghaj), CN 2019 WETEX UAE, AE 2019 WEFTEC USA, USA 2019 VIETWATER (Hanoi), VN 2019 Aquatech China (Sanghaj), CN 2018 VIETWATER (Hanoi), VN 2018 Aquatech China (Sanghaj), CN 2018 GD Water, CN 2017 VIETWATER , VN 2017 Aquatech China (Sanghaj), CN 2016 Aquatech China (Sanghaj), CN
